radiometrix ltd m1144 application boards page 1 features ?? 4-bit global address, 4-bit slave unit id selectable via 8-way dip switch ?? 1 master, 15 slave units per site ?? unlimited number of drone receiver/decoders ?? usable with any bim footprint radios (up to 100m w) with a switching & settling time of <10ms ?? 5vdc 44ma or 12vdc 18ma relay to control de vices rated up to 8a 250vac or 5a 30vdc ?? alarm response time <1s to 16s (worst case for whole network) ?? frame synchronisation codes, check sums and a ddress are used to prevent false triggering ?? 3.6kbps bi-phase data packet encodes the alarm status and presence of each slave unit on the network ?? 1.65% (132ms in 8s) transmit duty cycle per slave unit ?? 8.8% (704ms in 8s) maximum radio channel occupancy per system ?? visual led indication of communication status and relay state ?? 4-times greater operating radius compared to a point-to-point system, using the same radio module ?? logic or switch input for momentary control of relay ?? 3.5ma average current (e.g. 34 weeks operating life from 6xd cells) ?? simple ?plug-and-play? setup. no complex programming needed applications ?? security and alarm systems ?? emergency assistance call system ?? status reporting and monitoring systems ?? rf remote control systems ?? industrial controls kit contents the m1144 application kit is supplied with the following contents: 1 m1144 encoder/decoder master board 1 m1144 encoder/decoder slave board 2 radiometrix transceiver module (ordered separately) 2 1/4-wavelength uhf monopole or vhf helic al antennas depending on module frequency additional requirement ?? external dc power supply these simple application boards constitute a bidirectional mesh networked remote control system. each board has 1-input, 1-output, a 4- bit global address and a 4-bit unit id (hence "m1144"). a complete system consists of a master board (which initiates communication burst cycles) and up to 15 slave units. any input activation on any slave (or the master) closes the relays on all units on the system. this makes the m1144 an ideal platform for an alarm system. figure 1: m1144 application boards mesh networked alarm control system issue 1, 4 december 2014 hartcran house, 231 kenton lane, harrow, middlesex, ha3 8rp, england tel: +44 (0) 20 8909 9595, fax: +44 (0) 20 8909 2233, www.radiometrix.com m1144
radiometrix ltd m1144 application boards page 2 m1144 controller and application board m1144 allows a network which is star based but 4-hops in all directions to enable a network which is 4 times as large as a standard simple star network. the boards are the same for both master and slave, it is just the m1444 firmware which is different for a master or a slave. common features and characteristics of the m1144 boards interfaces relay output (rla1) jp1 8a 250vac rated spdt change-over re lay (5v or 12v coils to order) 3.81mm pitch 3-way 2 part "phoenix " type terminal (com nc no) jp5 open drain switch instead of relay (optional) jp7 4 pin ancillary connector (+5v, aux1, aux2, gnd) input jp2 active low logic input. pull-up to 5v, and protection diodes provided 3.81mm pitch 2-way 2 part "phoenix" type terminal): compatible with normally open (n o) volt-free closing contact jp4 no jumper ? default od28 binary serial output mode jumper fitted - ascii diagnostic stream jp4a unused s1 8-way dip switches bits 7-4 global address bits 3-0 sending unit local id power jp3 12vdc and 5vdc versions available 3.81mm pitch 2 way 2 part "phoenix" type terminal 40ma peak (plus 18ma/44ma relay coil current if activated) 3.5ma average current (relay off, using 10mw bim1-173.225-10) rf right-angled sma or mcx socket (or optional terminal block) indicators d1 relay state red led d2, d3 communication link status red leds m1144 control chip 28-pin pic16f883-i/sp clock 10mhz (ceramic resonator) timer 1 32.768khz watch crystal data rate 3.6kbps biphase coded burst addressing user selectable 4-bit global address user selectable 4-bit sending unit local id response time <1s to 16s (worst case for whole network) extreme current saving measures switchable pull-ups on dip switch very low quiescent current 5v 100ma/250ma ldo linear regulator size 76 x 63 x 16mm (excluding connectors) (four 3.3mm diameter mounting holes are provided) operating temperature -20oc to +70oc (some radios may be limited to -10oc to +55oc) (storage -30oc to +70oc) radio modules compatible bim pinout transceiver 10mw bim1-173.225-10 (uk) 100mw bim1-151.300-10 (australia) 10mw nim2b-434.650-10 (eu) 25mw nim2b-458.700-10-25mw (uk) 5mw bim3g-869.85-10 (eu) not compatible with rdl2 or 500mw bim3h or bim1h due to 10ms preamble transmission and regulator current limitations
radiometrix ltd m1144 application boards page 3 led indications master leds in lock no comms d1 (bottom) relay activated d2 (left) short blink off d3 (right) regular long blink regular blink slave leds in lock no comms d1 (bottom) relay activated d2 (left) short blinks off d3 (right) various blinks constant on drone leds in lock no comms d1 (bottom) relay activated d2 (left) very short blink off d3 (right) long on/off cycle constant on figure 2: m1144 board component layout
radiometrix ltd m1144 application boards page 4 operational description in an m1144 system, timing is everything. data is only transmitted in carefully defined and synchronised timing "slots". the pr imary reference for this timing is generated by the master unit, and is received (and re-sent) by the slave units to provide a consistent time reference across the whole network. a slave unit without valid synchronisation cannot transmit. the diagram (below) shows how the system timings are arranged. 50ms long slot burst preamble framing sequence checksum address unit id alarm status 1s long frame slot 15 slot 14 slot 13 slot 12 slot 11 slot 10 slot 9 slot 8 slot 7 slot 6 slot 5 slot 4 slot 3 slot 2 slot 1 slot 0 dead time 800ms long slots 200ms 8s long group frame 7 frame 6 frame 5 frame 4 frame 3 frame 2 frame 1 frame 0 returning reply frames outgoing synchronisation frames figure 3: m1144 synchronised data burst slots of each slave and frame transmission in a group the basic timing element is a 50ms "slot" (into whic h a single transmission packet fits, with some margin for error). 16 slots (and 200m s of inactive dead-time) make an 800ms frame. each slot in a frame is assigned to a specific slave unit id number. a unit can only ever transmit in its assigned slot. (slot zero is never used) eight frames make up an 8 second group, althou gh it is easier to consider the first four "synchronisation" frames and the second four "reply" frames as almost separate things. imagine a system starting from "cold": in the first frame (zero), the master sends out a sync hronising message. this sets the timing "clock" for all slaves in range (these units we refer to as "zone 1 units". in fram e one, all these units re-transmit a sync message. units receiving any of these frame 1 messages, but out of range of the master, are the "zone 2" units in frame two, the zone two units transmit, and are heard by units further out (out of rnage of both master and zone 1 slaves), which co nstitute zone three. finally, in frame three the zone three slaves themselves transmit, to the furthe st distant units, in zone four. zone four units do not transmit a sync message. they wait until frame four and transmit the first generation of "reply" messages, which are received by the zone three slaves. in frame five, these units transmit their reply message to zone two, which then transmit to zone 1 in frame six, and finally in frame seven the zone 1 units transmit to the master. in this way, you can see that transmitted data radiat es outwards (like the rippl es in a pond) in frames 0-3, and "bounces back" inwards in frames 4-7. reply message bursts carry alarm, and "unit presen t on system" information from the network back to the master. on re-sending a reply burst, each sl ave unit adds its own information to the message synchronisation messages carry timi ng information out through the ne twork, but also contain the sum of all the network alarm and status information as rece ived by the master in the previous frame. this is critically important, as the previous-frame netw ork data contained in the synchronising messages allows every unit (slave, drone or master) to act on any alarm input, and allows every unit to output the same serial data on its auxiliary port
radiometrix ltd m1144 application boards page 5 ml1144 timings and battery consumption the battery consumption is very important in this sy stem and the synchronising system used allows the units to maximise battery life. for example, take the worst case, zone 2 or 3 radio, identity number 15. idle current is approximately 100 a at 4.65 seconds in every 8 second group = 0.06ma contribution tx contribution: 750ms at 2.4ma (processing) 44ms tx actually on, at 29ma three times over = 1.197ma rx contribution: 850ms at 9ma (main listen) 100ms at 12ma (sync listen, led on) = 2.36ma in worst case sync (receiving a sync from a zone 2 unit with slave id of 14) the sync listen contribution alone rises by 0.9ma, giving us 3.26ma total current. so an average current would be around 3.5ma. 3.5ma on 20ah alkaline battery (6 x d) will last 5700 hours: which is 34 weeks ( over eight months ) (a pp3 battery will run the unit for a week) response time alarm "on" activation is faster than "a larm off" (for obvious safety reasons). whenever a unit receives either a sync or reply messa ge with any alarm state bit set, it will enter the "alarm on" state and activate its relay. this means th at when a unit is activated, the closest units to it (the ones in range) will go into alarm mode as s oon as they receive its transmitted message. this will occur within one group, and possibly within the same frame if the activation precedes the unit's slot. this is the fastest possible response time for the sy stem. generally the worst case should be considered: the time for a unit in zone 4 to alar m in response to the activation of another zone 4 unit, on the "other side" of the network. in this case, the data bit must propagate in to the master (4 frames) and out again (4 frames): 8 seconds, but to this we must add the even worse situat ion, that the activation occurs just after the unit's assigned slot: in this case a whole group will tick pa st before the activated unit will get to transmit its "new" data ... so 16 seconds will elapse. setting these units are supplied in "slave" and "master" varieties. to maximise operating area, the master should be located in the middle of the site. the high order 4 dip switch bits are the 4 bit global (site) address. this must be the same on all units in a system. each unit on system must have a unique number. the local id on a master should be set at 0000 local slave id numbers (low order dip switch) must be set between 1 and 15. local id of zero on a slave unit is a sp ecial case, turning the unit into a "drone" a drone listens but does not send data. this is usef ul where you want to have an indicator only like a siren but no push button alert. it is also useful if you use the aux1 serial output pin to look at the data on the system. if the data is fed into a board which contains an od28 output decoder chip it allows the user to display led indicators of which unit has ac tivated. the od28 ics can be purchased separately to enhance the system. serial link a serial link via jp7 aux1 is provided which has two modes: 1) if the jp4 jumper link nearest the radio module is fitted, the datastream is a human-readable ascii diagnostic stream of 1s and 0s indicating status of the system and each cycle outputs effectively the message which is being sent to the system from the master 2) if jumper is removed a special od28 binary stre am is sent every cycle and therefore is used by
radiometrix ltd m1144 application boards page 6 systems with the od28 board for indication purp oses. the od28 allows th e user to see units present and alarm states in the form of led indicators. figure 5: m1144 application board schematics
radiometrix ltd m1144 application boards page 7 ordering information part no. version frequency (mhz) m1144-173.225-bim1-m master control board 173.225 m1144-173.225-bim1-s slave control board 173.225 other vhf frequency variants can be supplied if required. m1144-434.650-nim2b-m master control board 434.650 m1144-434.650-nim2b-s slave control board 434.650 m1144-458.700-nim2b-m-25mw master control board 458.700 m1144-458.700-nim2b-s-25mw slave control board 458.700 other uhf frequency variants can be supplied if required. note : for details relating to the radio module fitted on board, see relevant data sheet http://www.radiometrix.com/ files/additional/bim1.pdf http://www.radiometrix.com/ files/additional/nim2b.pdf frequencies and options the mater and slave units can take any of the radiometrix 10mw-100mw vhf/uhf transceiver units which have a bim footprint and switching and sett ling time of less than 10ms, thereby offering a number of frequency and power options. call sales on +44 20 8909 9595 to see what frequencies and power levels are available in your country.
radiometrix ltd hartcran house 231 kenton lane harrow, middlesex ha3 8rp england tel: +44 (0) 20 8909 9595 fax: +44 (0) 20 8909 2233 sales@radiometrix.com www.radiometrix.com copyright notice this product data sheet is the original work and copyrighted property of radiometrix ltd. reproduction in whole or in part must give cl ear acknowledgement to the copyright owner. limitation of liability the information furnished by radiometrix ltd is be lieved to be accurate and reliable. radiometrix ltd reserves the right to make changes or improvements in the design, specification or manufacture of its subassembly products without not ice. radiometrix ltd does not a ssume any liability arising from the application or use of any product or circuit de scribed herein, nor for any infringements of patents or other rights of third parties which may result fr om the use of its products. this data sheet neither states nor implies warranty of any kind, including fitness for any particular application. these radio devices may be subject to radio interference and may not function as intended if interference is present. we do not recommend their use for life critical applications. the intrastat commodity code for all our modules is: 8542 6000 r&tte directive after 7 april 2001 the manufacturer can only pl ace finished product on the market under the provisions of the r&tte direct ive. equipment within the sc ope of the r&tte directive may demonstrate compliance to the essential requirements specified in article 3 of the directive, as appropriate to the particular equipment. further details are available on the office of communications (ofcom) web site: http://stakeholders.ofcom.org. uk/spectrum/technical/rtte/ information requests ofcom riverside house 2a southwark bridge road london se1 9ha tel: +44 (0)20 7981 3000 fax: +44 (0)20 7981 3333 www.ofcom.org.uk european radiocommunications office (ero) peblingehus nansensgade 19 dk 1366 copenhagen tel. +45 33896300 fax +45 33896330 ero@ero.dk www.ero.dk
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